Principles of Operation
WARNING: This page is about a different car, the 2003 Lincoln LS. However, it is still accessible from the selected car via links, so may be relevant.
The generator on this vehicle has built-in voltage regulator set point. The generator decides optimal charging system voltage based on temperature. The generator has a communication line (GEN MON) to the PCM, which indicates the generator operating duty cycle. This is a pulse width modulated signal. The communication line (GEN MON) is used for fault indication as well. The generator has an I-terminal used for initially turning on the generator. The generator has a battery sense terminal (A-terminal).